Answer:
(a) 8:11
(b) 3:8
Explanation:
(a)
The problem asks for the number of used books to all the books on the shelf. We know that there are 11 books, and 3 of them are new. You, we can do 11 - 3 = x to get the number of used books.
11 - 3 = 8
Therefore, the ratio of the number of used books to all the books on the shelf is 8:11
(b)
The problem asks for the number of new books to the number of used books. We know from the last problem that there are 3 new books, and 8 used books.
Therefore, the ratio of new books to the number of used books is 3:8
Hope this helps!